JP7310494B2 - Media transport device, processing device, recording system - Google Patents

Description

The present invention relates to a medium transporting device that transports a medium, a processing device that includes the medium transporting device, and a recording system that includes the processing device.

A processing device that performs a predetermined process on media can perform saddle stitching to bind the center of a plurality of media in the width direction, and then fold the media at the binding position to form a booklet. There is something that consists of
In addition, when such a processing apparatus is incorporated into a recording system capable of continuously performing recording on a medium by a recording apparatus represented by an inkjet printer, saddle stitching processing and folding processing of the recorded medium. There is also

Such a processing apparatus transports media before processing to a stacking unit on which media are stacked by a media transporting device, aligns the edges of the media stacked on the stacking unit by abutting them against the aligning unit, and then performs saddle stitching. There are some that are configured to do
As an example, in Patent Document 1, a compile tray corresponding to the stacking section, an end guide corresponding to the aligning section, a paddle for moving a sheet corresponding to the medium toward the end guide, and a A configuration is disclosed that includes a pair of jogger fences that slide to align the stacked sheets in the width direction.

JP 2010-001149 A

In the above-described medium conveying device, the medium bundle is held toward the stacking section so that the medium bundle is not disturbed, and the width direction of the medium bundle, which is the direction intersecting the conveying direction, is controlled. Edges are preferably restricted. Then, when the media are fed onto the stacking portion, the pressing of the medium stack toward the stacking portion can be released for a minimum necessary time, and the restriction of the edge of the media stack in the width direction can be released. preferable.
Here, when the slippage between the media is poor and the coefficient of friction between the media is large as in the case where ink jet recording is performed on the media, for example, the downstream end in the conveying direction of the medium stacked most recently is It may stop at an inappropriate position without reaching the matching part. However, even in such a case, when the subsequent medium is fed, by moving the medium stopped at the inappropriate position in the transport direction, the medium stopped at the inappropriate position is moved downstream in the transport direction. Sometimes the edge can reach the match. However, such an effect cannot be expected for the last medium among the plurality of media stacked on the stacking unit. Therefore, there is a risk that the media stack may be processed while the media stack is not properly aligned.

In order to solve the above-described problems, a medium transporting apparatus of the present invention includes a feeding means for transporting a medium, and a support surface for supporting the medium transported by the feeding means in an inclined posture in which the downstream side of the transporting direction faces downward. a stacking portion for stacking media on the support surface; an aligning portion for aligning the downstream ends of the media stacked on the stacking portion in the conveying direction; and the downstream ends of the media stacked on the stacking portion. a holding portion capable of switching between a first state of pressing a predetermined range upstream in the conveying direction from the pressing portion toward the supporting surface and a second state of moving away from the supporting surface from the first state, wherein the pressing portion The unit takes the first state while waiting for the medium to be fed to the stacking unit, switches from the first state to the second state when the medium is fed to the stacking unit, and then switches to the second state. to the first state, and when a plurality of media are stacked on the stacking unit, if the last medium is stacked on the stacking unit, the media before the last medium are stacked on the stacking unit. It is characterized in that the timing at which the pressing portion returns from the second state to the first state is later than in the case where the pressing portion is returned to the first state.

The figure which shows the whole structure of a recording system. FIG. 3 is a side view of the saddle stitch folding mechanism; FIG. 3 is a side view of the saddle stitch folding mechanism; FIG. 3 is a side view of the saddle stitch folding mechanism; FIG. 3 is a side view of the saddle stitch folding mechanism; FIG. 3 is a side view of the saddle stitch folding mechanism; 2 is a plan view of the medium conveying device; FIG. The figure which looked at the side guide and the stacker part from the conveyance direction. The figure which shows the operation|movement of an alignment part and a side guide. 4 is a flow chart showing control of the matching unit and the side guides; 4 is a timing chart showing the operation of the matching section and side guides;

The present invention will be briefly described below.
A medium conveying device according to a first aspect includes a feeding unit that conveys a medium, and a support surface that supports the medium conveyed by the conveying unit in an inclined posture in which a downstream side of the conveying direction faces downward. a stacking unit for stacking media on a surface; an aligning unit for aligning downstream ends of the media stacked on the stacking unit in the transport direction; a holding portion capable of switching between a first state in which a predetermined range of upstream is pressed toward the supporting surface and a second state in which the holding portion is separated from the supporting surface from the first state; The first state is set when waiting for the medium to be fed to the stacking section, and when the medium is fed to the stacking section, the state is switched from the first state to the second state, and then from the second state to the first state. Returning to , when a plurality of media are stacked on the stacking section, when the last medium is stacked on the stacking section, the media before the last medium are stacked on the stacking section. and the timing of returning the pressing portion from the second state to the first state is delayed.

According to this aspect, when a plurality of media are stacked on the stacking unit, if the last medium is stacked on the stacking unit, the media before the last medium are stacked on the stacking unit. Since the timing at which the pressing portion returns from the second state to the first state, i.e., the timing at which the medium is pushed toward the support surface, is later than the case, the downstream end of the last medium is more reliably aligned with the aligning portion. can be reached and thus better matching results can be obtained.
Further, it is possible to suppress a decrease in throughput as compared with the case where the timing delay is applied to all the media stacked on the stacking unit.
In this specification, the term "the last medium when a plurality of media are stacked on the stacking unit" refers to a medium bundle when processing such as binding is performed on the medium stack stacked on the stacking unit. or the medium positioned at the top of the medium bundle when the medium bundle is not processed and is discharged from the stacking unit to another location as it is.

In a second aspect, in the first aspect, the first side guide faces one edge in the width direction, which is the direction intersecting the conveying direction, of the media stacked on the stacking section, and the other edge faces the other edge. The first side guide and the second side guide are displaced between an alignment position for aligning the edge of the medium in the width direction and a separation position for separating from the edge of the medium from the alignment position. The first side guide and the second side guide are at the alignment position when waiting for the medium to be fed to the stacking section, and move from the alignment position to the alignment position when the medium is fed to the stacking section. When a plurality of media are stacked on the stacking unit after being displaced to the spaced position and then returning from the spaced position to the alignment position, when the last medium is stacked on the stacking unit, the last medium is placed first. The timing of returning the first side guide and the second side guide from the spaced position to the alignment position is later than when the previous medium is stacked on the stacking unit.

According to this aspect, when a plurality of media are stacked on the stacking unit, if the last medium is stacked on the stacking unit, the media before the last medium are stacked on the stacking unit. Since the timing at which the first side guide and the second side guide return from the spaced position to the alignment position is later than in the case, in a state where the downstream end of the last medium more reliably reaches the alignment portion, The widthwise edges can be aligned, thus obtaining better alignment results.

According to a third aspect, in the second aspect, the holding portion changes from the second state to the first state after the first side guide and the second side guide return from the separated position to the alignment position. Characterized by going back.
According to this aspect, after the first side guide and the second side guide return from the separated position to the alignment position, the pressing portion returns from the second state to the first state. However, the alignment of the medium by the first side guide and the second side guide is not hindered.

A fourth aspect is, in the second or third aspect, positioned between the feeding means and the aligning section in the conveying direction and opposed to the support surface, and rotates while contacting the medium. Thus, a paddle for moving the medium toward the alignment section is provided.
According to this aspect, the medium is positioned between the feeding means and the aligning section in the conveying direction and opposed to the supporting surface, and rotates while being in contact with the medium, thereby moving the medium to the aligning section. Since the paddle is provided for moving toward, the downstream end of the media can more reliably reach the alignment section, and thus a better alignment result can be obtained.

A fifth aspect is any one of the second to fourth aspects, wherein the pressing portion returns to the first state from the second state, and the first side guide and the second side guide are separated from each other. The timing of returning from the position to the alignment position is adjusted according to conditions when the medium is sent to the stacking section.

According to this aspect, the timing at which the pressing portion returns from the second state to the first state and the timing at which the first side guide and the second side guide return from the spaced position to the alignment position correspond to the loading position. Since the adjustment is made according to the conditions when the medium is sent to the part, the downstream end of the medium can more reliably reach the aligning part, and thus a more appropriate alignment result can be obtained.

A processing apparatus according to a sixth aspect includes the medium transporting apparatus according to any one of the first to fifth aspects, and a processing unit that processes the media stacked on the stacking unit. .
According to this aspect, in the processing apparatus, the effects of any one of the first to fifth aspects described above can be obtained.

A recording system according to a seventh aspect comprises a recording unit that records on a medium, and a processing device according to the sixth aspect that receives and processes the medium on which recording has been performed by the recording unit. characterized by
According to this aspect, in the recording system, the effects of the sixth aspect described above can be obtained.

The present invention will be specifically described below.
The XYZ coordinate system shown in each figure is an orthogonal coordinate system, in which the X-axis direction indicates the device depth direction, the Y-axis direction indicates the device width direction, and the Z-axis direction indicates the device height direction and is vertical. showing direction.

<<<Outline of the recording system>>>
As an example, the recording system 1 shown in FIG. 1 includes a recording unit 2, an intermediate unit 3, a first unit 5, and a detachable unit 5 in this order from the right to the left in FIG. and a second unit 6 as a processing device.

The recording unit 2 performs recording on the conveyed medium. The intermediate unit 3 receives the medium after recording from the recording unit 2 and delivers it to the first unit 5, and mainly functions to accelerate the drying of the medium. The first unit 5 is provided with a drying section 50 that performs drying processing on received media, and an end binding section 42 that performs end binding processing for binding media after recording in the recording unit 2 into a bundle. The second unit 6 is provided with a saddle-stitch folding mechanism 70 that binds and folds the center of the bundle of media after recording in the recording unit 2 to form a booklet. In the following, the processing of binding the center of the bundle of media after recording and the subsequent processing of folding the bundle of media will be simply referred to as “saddle stitching processing”.
The recording unit 2, the intermediate unit 3, the first unit 5, and the second unit 6 will be described in detail below.

<<<About the recording unit>>>
The recording unit 2 is configured as a multifunction machine including a printer section 10 having a line head 20 as a recording section for recording on a medium and a scanner section 11 . In this embodiment, the line head 20 is configured as a so-called ink jet recording head that performs recording by ejecting ink, which is an example of a liquid, onto a medium.
A cassette housing section 14 having a plurality of medium housing cassettes 12 is provided in the lower portion of the printer section 10 . The medium P contained in the medium containing cassette 12 is sent to the recording area by the line head 20 through the feeding path 21 indicated by the solid line, and the recording operation is performed. After recording by the line head 20, the medium is sent through a first discharge path 22, which is a path for discharging the medium to a post-recording discharge tray 13 provided above the line head 20, or a path for sending the medium to the intermediate unit 3. , or the second discharge path 23.

In FIG. 1, the first discharge path 22 is indicated by a dashed line, and the second discharge path 23 is indicated by a one-dot chain line. The second ejection path 23 extends in the +Y direction of the recording unit 2 and delivers the medium to the receiving path 30 of the adjacent intermediate unit 3 .

The recording unit 2 is also equipped with a reversing path 24 indicated by a chain double-dashed line in FIG. 1, and is capable of double-sided recording by reversing the medium and recording on the second side after recording on the first side of the medium. is configured to In each of the feeding path 21, the first ejection path 22, the second ejection path 23, and the reversing path 24, one or more pair of roller pairs (not shown) are arranged as an example of means for transporting the medium. there is

The recording unit 2 is provided with a control section 25 that controls operations related to medium conveyance and recording in the recording unit 2 . In the recording system 1, the recording unit 2, the intermediate unit 3, the first unit 5, and the second unit 6 are mechanically and electrically connected to each other, and the medium can be conveyed from the recording unit 2 to the second unit 6. is configured to Note that the control section 25 in this embodiment can control various operations in the intermediate unit 3, the first unit 5, and the second unit 6 connected to the recording unit 2. FIG.

The recording unit 2 has an operation unit 19, through which various settings and execution commands regarding various processes in the recording unit 2, the intermediate unit 3, the first unit 5, and the second unit 6 can be input. configured to allow The operation unit 19 also has a display panel (not shown), and is configured to display various information on this display panel.

<<<About the intermediate unit>>>
Next, the intermediate unit 3 will be explained. The intermediate unit 3 shown in FIG. 1 passes the media received from the recording unit 2 to the first unit 5 . The intermediate unit 3 is arranged between the recording unit 2 and the first unit 5 . The medium conveyed through the second discharge path 23 of the recording unit 2 is received by the intermediate unit 3 through the receiving path 30 and conveyed toward the first unit 5 . It should be noted that the receiving path 30 is indicated by a solid line in FIG.

In the intermediate unit 3, there are two transport paths for transporting the medium. The first transport route is a route from the receiving route 30 to the merging route 33 via the first switchback route 31 indicated by the dotted line in FIG. The second route is a route from the receiving route 30 to a merging route 33 via a second switchback route 32 indicated by a chain double-dashed line in FIG.
The first switchback path 31 is a path for switching back the medium in the direction of arrow A2 after receiving the medium in the direction of arrow A1. The second switchback path 32 is a path for switching back the medium in the direction of arrow B2 after receiving the medium in the direction of arrow B1.

The receiving path 30 branches into a first switchback path 31 and a second switchback path 32 at a branching portion 35 . The branching unit 35 is provided with a flap (not shown) for switching the destination of the medium between the first switchback path 31 and the second switchback path 32 .

Also, the first switchback path 31 and the second switchback path 32 join at a junction 36 . Therefore, regardless of whether the medium is sent from the receiving path 30 to the first switchback path 31 or the second switchback path 32, the medium can be delivered to the first unit 5 via the common junction path 33.

The intermediate unit 3 receives the medium from the recording unit 2 into the receiving path 30 with the surface to be recorded by the line head 20 facing up, but the medium is curved and reversed in the merging path 33 so that the most recent recording surface faces downward. become facing.
Therefore, the medium with the most recent recording surface facing downward is transferred from the +Y direction of the intermediate unit 3 to the first transport path 43 of the first unit 5 .
One or more roller pairs (not shown) are arranged in each of the receiving path 30, the first switchback path 31, the second switchback path 32, and the merging path 33, as an example of means for conveying the medium. ing.

In the recording unit 2, when recording is continuously performed on a plurality of media, the media entering the intermediate unit 3 are conveyed through the first switchback route 31, the second switchback route 32, and the like. alternately sent to As a result, the medium transport throughput in the intermediate unit 3 can be increased.

Further, in the case of a configuration in which liquid, specifically ink, is ejected onto a medium to perform recording, as in the line head 20 of the present embodiment, processing is performed in the first unit 5 or the second unit 6 in the subsequent stage. If the media is damp during this operation, the recording surface may be scratched and the media may be misaligned.
By transferring the medium after recording from the recording unit 2 to the first unit 5 via the intermediate unit 3, the transportation time until the medium after recording is sent to the first unit 5 is lengthened, and the first unit 5 Alternatively, the medium can be drier by the time it reaches the second unit 6 .

<<<About the first unit>>>
Next, the first unit 5 will be explained. The first unit 5 shown in FIG. 1 has a receiving section 41 that receives the medium from the intermediate unit 3 below in the -Y direction. A medium conveyed through the junction path 33 of the intermediate unit 3 enters the first unit 5 from the receiving section 41 and is delivered to the first conveying path 43 .

The first unit 5 includes a drying section 50 for processing the media received from the receiving section 41, and an edge binding unit for processing the media received from the receiving section 41 or the media processed by the drying section 50. a portion 42;
The first unit 5 includes a first transport path 43 for transporting the media received from the receiving part 41 to the end binding part 42 and a second transport path 43 for transporting the media to the drying part 50 by branching from the first transport path 43 at the second branch part D2. 2 conveying paths 44; A flap (not shown) for switching the destination of the medium between the first transport path 43 and the second transport path 44 is provided in the second branch part D2.

The edge binding unit 42 is a component that performs an edge binding process for binding an edge of a medium, such as a corner on one side of the medium or a side on one side of the medium. The end binding part 42 is configured with a stapler as an example.
The drying unit 50 is a component that performs a drying process on the medium. In this embodiment, the drying section 50 dries the medium by heating the medium. Although the detailed configuration of the drying section 50 will be described later, the medium after drying processing by the drying section 50 is sent to either the edge binding section 42 or the saddle stitch folding mechanism 70 provided in the second unit 6 .

The first unit 5 also includes a punch processing section 46 that punches the medium received from the receiving section 41 . The punch processing unit 46 is provided at a position close to the receiving unit 41 on the first transport path 43 through which the medium received by the first unit 5 passes, and can perform punch processing upstream of the first transport path 43. It is configured. Note that the medium received from the receiving unit 41 may or may not be punched by the punching unit 46 .

A medium received from the receiving section 41 can be sent to the processing tray 48 or the second unit 6 to be described later through the first transport path 43 shown in FIG. The media are stacked on the processing tray 48 with their rear ends aligned in the transport direction. After a predetermined number of media P are stacked on the processing tray 48 , the trailing edge of the media P can be edge-stitched by the edge-stitching unit 42 . The first unit 5 includes a second ejection section 62 that ejects the medium in the +Y direction. The first unit 5 includes a first ejection section 61 and a third ejection section 63, which will be described later, in addition to the second ejection section 62, and is configured to be able to eject the medium from these as well.

The medium processed by the end binding section 42 is discharged from the second discharge section 62 to the outside of the first unit 5 by discharge means (not shown), and the medium discharged from the second discharge section 62 is received by the first It is placed on the tray 40 . The first tray 40 is provided so as to protrude from the first unit 5 in the +Y direction. In this embodiment, the first tray 40 includes a base portion 40a and an extension portion 40b, and the extension portion 40b is configured to be housed in the base portion 40a.

Further, the first transport path 43 is connected to a third transport path 45 branching from the first transport path 43 at a third branch portion D3 downstream of the second branch portion D2. A flap (not shown) for switching the destination of the medium between the first transport path 43 and the third transport path 45 is provided in the third branch portion D3.

An upper tray 49 is provided above the first unit 5 . The third transport path 45 extends from the third branch portion D3 to the third discharge section 63, and the medium transported along the third transport path 45 is discharged from the third discharge section 63 to the upper tray 49 by discharge means (not shown). discharged to That is, the media received from the receiving section 41 can be discharged to the upper tray 49 without going through the end binding section 42 .

The first transport path 43 is provided with an overlapping path 64 that branches off from the first transport path 43 at a first branch portion D1 and rejoins the first transport path 43 at a first junction G1. The stacking path 64 constitutes a stacking processing section 47 that stacks two sheets of media and feeds them to the drying section 50 or the edge binding section 42 . The leading medium transported in advance is sent to the overlapping path 64, and the trailing medium transported along the first transport path 43 and the leading medium are joined at the first junction G1, thereby stacking the leading medium and the trailing medium. It can be conveyed downstream from the first junction G1. Note that the stacking processing unit 47 may be configured to provide a plurality of stacking paths 64 to stack three or more media and send them downstream.

In the first unit 5, the overlap processing section 47 is positioned vertically below the drying section 50, and the drying section 50, the end binding section 42, and the overlap processing section 47 are positioned vertically, that is, when viewed from above. have overlapping parts. Alternatively, only the drying section 50 and the overlapping processing section 47 or only the end binding section 42 and the overlapping processing section 47 may be overlapped.
By arranging the drying section 50, the end binding section 42, and the overlapping processing section 47 in such a positional relationship, it is possible to suppress an increase in the horizontal dimension of the apparatus and realize a reduction in the size of the apparatus.

In the first unit 5, each of the first transport path 43, the second transport path 44, and the third transport path 45 is provided with at least one pair of roller pairs (not shown) as an example of means for transporting the medium. It is

Next, the drying section 50 provided in the first unit 5 will be described.
The drying section 50 includes a heat roller pair 51 as a drying processing section that performs drying processing of the medium, and a loop-shaped transport path 52 including the heat roller pair 51 and capable of circularly transporting the medium. A second transport path 44 branched from the first transport path 43 joins the loop-shaped transport path 52 upstream of the heat roller pair 51, and the medium is fed by a transport roller pair 68 provided on the second transport path 44. , can be introduced into the looped transport path 52 .

In the heat roller pair 51, in this embodiment, the lower roller is a dry drive roller driven by a drive source (not shown), and the upper roller is a dry driven roller that rotates following the rotation of the dry drive roller. The dry drive roller is heated by a heater (not shown), thereby generating heat in the dry drive roller and drying the medium. However, at least one of the rollers constituting the heat roller pair 51 may be heated, and both may be heated.

However, the medium sent from the intermediate unit 3 enters the second transport path 44 from the receiving section 41 of the first unit 5 via the first transport path 43 with the nearest recording surface facing downward. Then, the medium is nipped by the heat roller pair 51 with the nearest recording surface facing downward. Therefore, it is preferable that the heated roller of the heat roller pair 51 is the roller that contacts the recording surface of the medium.

The drying section includes a loop-shaped transport path 52, and is configured so that the medium can be circulated in the loop-shaped transport path 52. By circulating and transporting the medium a plurality of times, the drying process by the heat roller pair 51 is performed. can be applied multiple times. Therefore, the medium can be dried more reliably.
In addition, by providing the loop-shaped transport path 52, for example, compared with the case where a plurality of heat roller pairs 51 are provided in the transport path, it is possible to suppress an increase in the cost of the apparatus and power consumption.

In the recording system 1 , heating by the heat roller pair 51 is controlled by the controller 25 provided in the recording unit 2 . The controller 25 can control heating of the heat roller pair 51 according to conditions. The conditions include, for example, the type, rigidity, thickness, basis weight, etc. of the medium, the amount of ink ejected onto the medium during printing in the printing unit 2, whether printing on the medium is double-sided printing or single-sided printing, and the drying time. environmental conditions, such as temperature and humidity.
By controlling the heating by the heat roller pair 51 according to these conditions, the medium can be dried more appropriately. The control of heating by the heat roller pair 51 includes, for example, the presence or absence of heating, the temperature when heating, whether or not preheating is performed when heating, the timing of starting heating of the heat roller pair 51, and the like.

In addition, in the heat roller pair 51, one drying driven roller is pressed against the other drying drive roller by a pressing means (not shown) such as a spring, and the pressing force of the pressing means can be configured to be changeable. . The nip pressure in the heat roller pair 51 can be adjusted by controlling the pressing force changing means (not shown) for changing the pressing force of the pressing means. It is preferable to change the nip pressure in the heat roller pair 51 according to the conditions. As the conditions, the same conditions as in the case of controlling heating by the heat roller pair 51 can be used.

A fourth transport path 59 is connected to the loop-shaped transport path 52 . The fourth transport path 59 is a path that joins the first transport path 43 at the second junction G<b>2 and returns the medium after the drying process by the heat roller pair 51 to the first transport path 43 .
A fifth transport path 60 is connected to the loop transport path 52 . The fifth transport path 60 is a path that continues to the first discharge section 61 and is a path that sends the medium after the drying process by the heat roller pair 51 toward the second unit 6 .
The first unit 5 switches between a first state in which the medium processed by the drying section 50 is sent to the first discharge section 61 and a second state in which the medium processed by the drying section 50 is sent to the end binding section 42. It has a switching flap (not shown) as a possible switching member.

It should be noted that the drying section 50 may be configured without the loop-shaped conveying path 52 .
Further, in the present embodiment, the drying unit 50 that dries the medium by heating the medium from the outside has been described, but the drying unit 50 is configured to dry the medium by blowing air onto the medium, for example. is also possible.

<<<About the second unit>>>
Next, the second unit 6 will be explained.
The second unit 6 is detachably attached to the first unit 5 below the first tray 40 of the first unit 5 .
The medium delivered from the first discharge section 61 of the first unit 5 to the second unit 6 is conveyed through the conveying path 69 and sent to the saddle stitch folding mechanism 70 . The saddle-stitching folding mechanism 70 includes a stacking section 71 as a stacking section for stacking media, and after binding a bundle of media stacked on the stacking section 71 at the saddle-stitching position, the saddle-stitching folding mechanism 70 folds at the saddle-stitching position to form a booklet. be able to.

After being saddle-stitched by the saddle-stitch folding mechanism 70, the medium bundle M is discharged to the second tray 65 shown in FIG. The second tray 65 is provided with a restricting portion 66 at the tip in the +Y direction, which is the medium ejection direction, so that the medium bundle M ejected to the second tray 65 protrudes from the second tray 65 in the medium ejection direction. prevent it from falling. Reference numeral 67 denotes a guide portion 67 that guides the medium bundle M ejected from the second unit 6 to the second tray 65 .

Next, the configuration of the saddle stitch folding mechanism 70 will be further described mainly with reference to FIGS. 2 and 7. FIG. In the following, one medium is referred to as medium P, and a medium bundle made up of a plurality of mediums P stacked on the stack section 71 is referred to as medium bundle M.
In FIG. 2, the saddle-stitch folding mechanism 70 includes a medium conveying device 80 and a processing section 70a. The medium conveying device 80 is provided on the conveying path 69, and includes a feed roller pair 75 as a feeding means for conveying the medium P, and a stacking section 71 as a stacking section for stacking the medium P conveyed by the feed roller pair 75. It has The processing unit 70a includes a binding mechanism 72 that binds the medium bundle M stacked on the stack unit 71 at the binding position, and a folding roller pair 73 as folding means that folds the medium bundle M at the binding position.

The feed roller pair 75 includes a drive roller 75a driven by a drive source (not shown) and a driven roller 75b that rotates following the rotation of the drive roller 75a. Rotation controlled by
Reference character G in FIG. 2 indicates a confluence position G where the conveying path 69 and the stack section 71 merge. The medium P is conveyed from the conveying path 69 to the stack section 71 by the conveying roller pair 75 .
The stack unit 71 includes a support surface 85 that supports the medium P transported by the pair of feed rollers 75 in an inclined posture in which the transport direction +R downstream faces downward. accept and stack.

As shown in FIGS. 2 and 7, the medium transport device 80 includes an aligning section 76 that aligns the downstream ends E1 of the plurality of media P stacked in the stack section 71, A first side guide 95 facing the edge F1 in the −X direction, a second side guide 96 facing the edge F2 in the +X direction of the media P stacked in the stacking section 71, and a first paddle for feeding the media P in the transport direction +R. 81 and a second paddle 82, and a first auxiliary paddle 83 and a second auxiliary paddle 84 for assisting feeding of the medium P by these paddles.

The first paddle 81 is the first paddle positioned downstream of the feed roller pair 75 and also downstream of the folding roller pair 73 in the transport direction +R. The first paddle 81 is arranged to face the support surface 85 of the stack portion 71 .
The second paddle 82 is located downstream of the first paddle 81 in the transport direction +R and arranged to face the support surface 85 of the stack section 71 .
The first paddle 81 and the second paddle 82 move the medium P toward the alignment section 76 by rotating clockwise in FIG. 2 while contacting the medium P. As shown in FIG. The first paddle 81 and the second paddle 82 rotate under the control of the controller 25 (see FIG. 1).

The first auxiliary paddle 83 is located downstream of the second paddle 82 in the conveying direction +R and arranged to face the support surface 85 of the stack section 71 .
The second auxiliary paddle 84 is located downstream of the first auxiliary paddle 83 in the transport direction +R and arranged to face the support surface 85 of the stack section 71 .
The first auxiliary paddle 83 and the second auxiliary paddle 84 rotate in the same direction as the first paddle 81 and the second paddle 82, that is, in the clockwise direction in FIG. do. The first auxiliary paddle 83 and the second auxiliary paddle 84 rotate under the control of the controller 25 (see FIG. 1).
The first paddle 81, the second paddle 82, the first auxiliary paddle 83, and the second auxiliary paddle 84 are hereinafter referred to as a "paddle group" for the sake of convenience when there is no particular need to distinguish them.

The stack portion 71 is provided with an alignment portion 76 capable of contacting the downstream end E1 of the medium P and a contact portion 77 capable of contacting the upstream end E2 of the medium P. As shown in FIG. The aligning portion 76 and the contact portion 77 are configured to be movable in both the conveying direction +R and the opposite direction −R by driving means (not shown).
The alignment portion 76 aligns the downstream end E1 of the medium P, and the contact portion 77 aligns the upstream end E2 of the medium P. As shown in FIG. The alignment portion 76 and the contact portion 77 can be moved in the transport direction +R and the reverse direction -R using, for example, a rack and pinion mechanism or a belt movement mechanism operated by the power of a drive source (not shown).

Further, the aligning portion 76 is integrally formed with a pressing portion 76 a that presses a predetermined range upstream from the downstream end E<b>1 of the medium P toward the support surface 85 . The pressing portion 76a is in a first state (FIGS. 3 and 4) in which a predetermined range upstream from the downstream end E1 of the medium bundle M is pressed against the support surface 85 by the power of a drive source (not shown). It is possible to switch between a second state (FIGS. 2, 5, and 6) in which it is further away from the support surface 85 . For the sake of convenience, the first state of the pressing portion 76a is hereinafter referred to as the "open state", and the second state is referred to as the "closed state".
The alignment portion 76, the pressing portion 76a, and the contact portion 77 are controlled by the control portion 25 (see FIG. 1).

In FIG. 7, the stacking section 71 includes a first side guide 95 facing the -X direction edge F1 of the media P stacked in the stacking section 71 as described above, and a +X side guide of the media P stacked in the stacking section 71 . A second side guide 96 is provided facing the directional edge F2. The first side guide 95 and the second side guide 96 are configured to be movable in the X-axis direction, which is the width direction of the media P in the stack section 71, by a driving means (not shown). The first side guide 95 and the second side guide 96 can be moved in the -X direction and the +X direction using, for example, a rack and pinion mechanism or a belt moving mechanism operated by the power of a drive source (not shown).

The first side guide 95 and the second side guide 96 are displaced toward each other and come into contact with the edges F1 and F2 of the media P stacked in the stacking section 71, so that the edges F1 and F2 of the media P in the width direction 9 (states (b) and (c) in FIG. 9) and a spaced position (state (a) in FIG. 9) away from the edges F1 and F2 from this aligned position. In FIG. 9, the first side guide 95 and the second side guide 96 displaced from the separated position to the aligned position are indicated by hatching. is shown with
The first side guide 95 and the second side guide 96 are controlled by the controller 25 (see FIG. 1).

In this embodiment, as shown in FIG. 8, the first side guide 95 has a shape in which a predetermined range in the X-axis direction including the edge F1 of the medium P enters when viewed from the transport direction. 96 also has a shape in which a predetermined range in the X-axis direction including the edge F2 of the medium P is included. In FIG. 8, reference numeral 95a indicates a surface that contacts the edge F1 of the medium P, and reference numeral 96a indicates a surface that contacts the edge F2 of the medium P. As shown in FIG.
The stacking height of the medium bundle M that can be stacked on the stacking portion 71 is limited by the distance T1 between the support surface 85 and the surfaces of the first side guide 95 and the second side guide 96 facing the support surface 85 . In this embodiment, when the pressing portion 76a is in the open state, the distance between the surface of the pressing portion 76a facing the support surface 85 and the support surface 85 is also configured to be the same size as the interval T1.

As shown in FIG. 7, a plurality of paddle groups are provided at suitable intervals in the medium width direction. In this embodiment, four first paddles 81 are provided in the medium width direction, and two second paddles 82 are provided in the medium width direction. Four first auxiliary paddles 83 and four second auxiliary paddles 84 are provided in the medium width direction. Since the number of the second paddles 82 installed is smaller than the number of the first paddles 81 installed, excessive medium transport by the second paddles 82 can be suppressed.
In this embodiment, four aligning portions 76 and four pressing portions 76a are provided in the medium width direction, and an opening 71a is provided in the stack portion 71 along the moving direction of the aligning portion 76. An alignment portion 76 and a pressing portion 76a are arranged inside. Since the medium P cannot be supported at the position of the opening 71a, each paddle is arranged at a position avoiding the opening 71a.
A straight line CL in FIG. 7 indicates the center position in the X-axis direction, that is, in the medium width direction. Each paddle is arranged symmetrically with respect to the center position CL in the medium width direction.

In FIG. 7, reference numeral 91 denotes a rotating shaft 81a, that is, a motor that serves as a power source for the first paddle 81; A motor serving as a power source for the auxiliary paddle 84, and reference numeral 94 denotes a power transmission unit that transmits driving force from the second motor 92 to the rotating shafts 82a, 83a, and 84a.

Next, in FIG. 2, a binding mechanism 72 that binds the medium bundles M stacked in the stacking section 71 at a predetermined position in the transport direction +R is provided downstream of the merging position G. As shown in FIG. The binding position in this embodiment is the central portion C in the transport direction +R of the medium bundle M stacked in the stack portion 71 .
The binding mechanism 72 is, for example, a stapler, and binds the medium bundle M at a binding portion 72a, which is an example of binding means. A plurality of binding portions 72a are provided at intervals in the X-axis direction, which is the width direction of the medium P. As shown in FIG. As described above, the binding mechanism 72 is configured to bind the medium bundle M with the central portion C of the medium bundle M as the binding position in the transport direction.

A folding roller pair 73 is provided downstream of the binding mechanism 72 . The facing surface 86 has an opening at a position corresponding to the nip position N of the folding roller pair 73 , and an entrance path 78 for the medium bundle M from the stack section 71 to the folding roller pair 73 is formed. At the entrance of the entrance path 78 of the facing surface 86, an inclined surface is formed to guide the center portion C, which is the binding position, from the stack portion 71 to the nip position N. As shown in FIG.

On the opposite side of the folding roller pair 73 across the stacking section 71, there are a retracted state in which the sheets are retracted from the stacking section 71 as shown in FIGS. A blade 74 is provided that can switch between an advanced state and an advanced state with respect to the binding position of the bundle of media M. Reference numeral 79 denotes a hole 79 provided in the support surface 85, through which the blade 74 can pass.

<<<Conveying media during saddle stitching>>>
Next, with reference to FIGS. 2 to 8, a basic flow of conveying the medium P in the second unit 6, performing saddle stitching, and discharging will be described.
In the state before the medium P is sent to the stack section 71, that is, in the standby state, the pressing section 76a is in the closed state, and the first side guide 95 and the second side guide 96 are in the alignment position (state (c) in FIG. 9). )). This suppresses misalignment of the media P already stacked on the stack unit 71, ie, the media bundle M. FIG. In addition, hereinafter, when there is no need to distinguish between the first side guide 95 and the second side guide 96, they will be referred to as "a pair of side guides" for the sake of convenience.
At this time, the paddle group is maintained in a stopped state in a phase where it does not come into contact with the medium P as shown in FIG. 2 before the first medium P is fed.

When the medium P is fed into the stack section 71, the pressing section 76a is switched from the closed state to the open state, and the pair of side guides are displaced from the aligned position to the separated position (state (a) in FIG. 9).
When the medium P sent to the stack section 71 is the first medium P, the paddle group starts rotating at the timing when the medium P is sent to the stack section 71 by the feed roller pair 75 (see FIG. 2). controlled as follows. After that, the paddle group continues to rotate until the last medium P is fed, the saddle stitching process is completed, and the medium bundle M is discharged by the folding roller pair 73 .
In FIG. 2, the medium P sent to the stack section 71 moves toward the aligning section 76 by its own weight, and the downstream single E1 is abutted toward the aligning section 76 by the rotation of the paddle group.
FIG. 2 shows a state in which a plurality of media P are stacked as a medium bundle M in the stack section 71 .

When receiving the medium P in the stacking section 71, the aligning section 76 is configured so that the distance from the confluence position G of the transport path 69 and the stacking section 71 to the aligning section 76 is the length of the medium P, as shown in FIG. It is arranged so that it is longer than the height. As a result, the upstream end E2 of the medium P conveyed from the conveying path 69 does not remain in the conveying path 69, and the medium P is received by the stack section 71. FIG. The position of the alignment section 76 in the transport direction +R of the stack section 71 can be changed according to the size of the medium P. FIG.

After the timing at which the downstream end E1 of the medium P reaches the aligning portion 76, first, the pair of side guides is displaced from the separated position to the aligning position (state (b) in FIG. 9). After that, the pressing portion 76a is switched from the open state to the closed state (state (c) in FIG. 9 and FIG. 3).
Until the last medium P is stacked in the stacking section 71, the pair of side guides and the pressing section 76a make state transitions in this order of state (a), state (b), and state (c) in FIG. repeat.

Next, when the last medium P is stacked in the stacking section 71, binding processing is performed to bind the central portion C of the medium bundle M in the transport direction +R with the binding section 72a. When the transportation of the medium P from the transportation path 69 to the stacking section 71 is completed, the central portion C is displaced from the position of the binding section 72a as shown in FIG. By moving the portion 76 in the -R direction, the central portion C of the medium bundle M is arranged at a position facing the binding portion 72a. Further, the contact portion 77 is moved in the +R direction to contact the upstream end E2 of the medium bundle M. The downstream end E1 and the upstream end E2 of the medium bundle M are aligned by the aligning portion 76 and the contact portion 77, and the central portion C of the medium bundle M is bound by the binding portion 72a.

After the bundle of media M is bound by the binding portion 72a, the pair of side guides is displaced from the aligned position to the separated position, and the pressing portion 76a is switched from the closed state to the open state. After that, as shown by the change from FIG. 4 to FIG. 2, the aligning portion 76 is moved in the +R direction so that the bound central portion C is arranged at a position facing the nip position N of the folding roller pair 73. The medium bundle M is moved. The medium bundle M can be moved in the +R direction by moving only the alignment portion 76 in the +R direction while maintaining the state in which the medium bundle M is in contact with the alignment portion 76 due to its own weight. The contact portion 77 may be moved in the +R direction so as to maintain contact with the upstream end E2 of the medium bundle M.

Subsequently, when the central portion C of the medium bundle M is arranged at a position facing the nip position N of the folding roller pair 73, as shown in FIG. It is bent toward the roller pair 73 . The central portion C of the bent medium bundle M passes through the entrance path 78 and the medium bundle M is moved toward the nip position N of the folding roller pair 73 .

When the central portion C of the medium bundle M is nipped by the folding roller pair 73, the folding roller pair 73 rotates, and as shown in FIG. while being ejected toward the second tray 65 (see FIG. 1).
Also, after the central portion C is nipped by the pair of folding rollers 73 , the aligning portion 76 moves in the +R direction and returns to the state shown in FIG.

Incidentally, the transport path 69 may be provided with folding line forming means for forming a folding line in the central portion C of the medium P. As shown in FIG. By forming a crease in the center portion C, which is the folding position of the pair of folding rollers 73, the media bundle M can be easily folded at the center portion C. As shown in FIG.

<<<Operations of the first side guide, the second side guide, and the presser>>>
Next, the operation of the pair of side guides and pressing portion 76a will be described in detail with reference to FIGS. 10 and 11. FIG.
First, a problem in stacking media P on the stack unit 71 will be described with reference to FIG. As described above, the pressing portion 76 a assumes the closed state (first state) while waiting for the medium P to be fed into the stack portion 71 , and changes from the closed state to the open state (first state) when the medium P is fed into the stack portion 71 . 2 state), and then return from the open state to the closed state.
Here, when the media are not slippery and the coefficient of friction between the media is large, as in the case of ink jet recording, the downstream end E1 of the most recently stacked medium P reaches the aligning portion 76. It may be stuck in an inappropriate position. However, even in such a case, the succeeding medium P moves the medium P stopped at the inappropriate position in the transport direction +R, thereby moving the downstream end E1 of the medium P stopped at the inappropriate position. can reach matching section 76 .
However, such an effect cannot be expected for the last medium P among the plurality of mediums P stacked on the stack section 71 . Therefore, there is a risk that the saddle stitching process will be performed on the medium bundle M while the medium bundle M is not properly aligned.

In order to solve such problems, the control shown in FIGS. 10 and 11 is executed.
In FIG. 10, the control unit 25 (see FIG. 1) determines whether or not the medium P to be sent to the stack unit 71 is the last medium P (step S101). No), the normal close mode is selected (step S102), and if it is the last medium P (Yes in step S101), the delayed close mode is selected (step S103).

The normal close mode and the delayed close mode will be described in detail with reference to FIG.
As described above, when waiting for the medium P to be fed into the stack section 71, the pair of side guides are aligned and the pressing section 76a is closed. When the medium P is sent to the stack section 71, the pair of side guides are displaced from the aligned position to the separated position, and the pressing section 76a is switched from the closed state to the open state. The timing at which the pair of side guides are displaced from the aligned position to the separated position and the timing at which the pressing portion 76a switches from the closed state to the open state are the same timing (timing t1).

When the medium P is fed into the stack section 71, the pair of side guides first returns from the separated position to the alignment position, and then the pressing section 76a returns from the open state to the closed state. As a result, the pressing portion 76a does not interfere with the alignment of the medium P by the pair of side guides.
In this embodiment, when the last medium P is stacked on the stack section 71, the pressing section 76a is closed from the open state more than when the media P before the last medium P are stacked on the stack section 71. It is controlled so that the timing of returning to the state is delayed. In FIG. 11, the chart of "first to last medium" indicates the normal closing mode, and the chart of "last medium" indicates the delayed closing mode.
In the normal closing mode, the timing t3 in FIG. 11 is the timing at which the pressing portion 76a returns from the open state to the closed state.In the delayed closing mode, the timing t3 in FIG. t5. The time from timing t3 to timing t5 is the delay time W2.
As a result, the downstream end E1 of the last medium P can more reliably reach the aligning portion, and a more appropriate aligning result can be obtained.
Further, it is possible to suppress a decrease in throughput as compared with the case where the delayed closing mode is applied to all the media P stacked in the stack section 71 .

Similarly, when the last medium P is stacked on the stack section 71, the pair of side guides move from the spaced position to the alignment position more than when the media P before the last medium P are stacked on the stack section 71. is controlled so that the timing of returning to
In the normal closing mode, the timing at which the side guides return from the separated position to the aligned position is timing t2 in FIG. 11. In the delayed closing mode, the timing at which the side guides return from the separated position to the aligned position is timing t4 in FIG. be. The time from timing t2 to timing t4 is the delay time W1.
As a result, the side guide can align the width direction edge of the medium P in a state where the downstream end E1 of the last medium P more reliably reaches the aligning portion 76, thereby obtaining a more appropriate alignment result. can be done.

Moreover, the timings (timings t3 and t5) in which the pressing portion 76a returns from the open state to the closed state and the timings (timings t2 and t4) in which the side guides return from the separated position to the alignment position are when the medium P is fed to the stack portion 71. It is also suitable to adjust according to the actual conditions. As a result, the downstream end E1 of the medium P can more reliably reach the aligning portion 76, and a more appropriate alignment result can be obtained.
For example, if the coefficient of friction between the media P is high, it becomes difficult for the downstream end E1 of the last medium P to reach the aligning portion 76. Therefore, the second medium P2, which has a higher coefficient of friction between the media P than the first medium P1, , it is preferable to extend the delay times W1 and W2.

Further, for example, when the medium P swells, the space T2 in FIG. 8, that is, the space above the last loaded medium Pm becomes narrower, making it difficult for the downstream end E1 of the last medium Pm to reach the aligning portion 76 . Therefore, when the medium P is sent to the second unit 6 under the second condition in which the swelling of the medium P is more pronounced than under the first condition, it is preferable to extend the delay times W1 and W2.

The swelling of the medium P is, for example, when the medium P is paper and the liquid is ink, the paper absorbs the ink. The swelling of the medium P changes depending on the type of paper, the amount of ink absorbed by the paper, temperature and humidity, and the length of drying time in the drying section 50 (see FIG. 1).
Specifically, when the paper is plain paper composed of a single layer, the swelling at the time of feeding into the second unit 6 is more pronounced than when the paper is special paper composed of multiple layers.
Also, when the amount of ejected ink is the second amount, which is larger than the first amount, the swelling at the time when the ink is sent to the second unit 6 becomes more pronounced than in the case of the first amount.
In addition, in the case of the second time, which is shorter than the first time, the drying time in the drying section 50 (see FIG. 1), the swelling at the time of feeding into the second unit 6 is greater than in the case of the first time. become conspicuous.
Moreover, in the case of the second humidity, which is higher than the first humidity, the swelling at the time of being sent to the second unit 6 is more pronounced than in the case of the first humidity.
In this way, when the medium P is sent to the second unit 6 under the second condition in which the swelling of the medium P is more pronounced than under the first condition, the delay times W1 and W2 can be extended to obtain a more appropriate A matching result is obtained.

In the above embodiment, the delayed closing mode is applied only to the last medium P, but the delayed closing mode may be applied to media P before the last medium P. Further, at that time, the delay times W1 and W2 may be increased as the stacking of the media P on the stack unit 71 progresses.

Incidentally, in the recording system 1, the intermediate unit 3 and the first unit 5 may be omitted. In this case, the recording unit 2 and the second unit 6 may be independent units, or the recording unit 2 and the second unit 6 may be integrated. That is, the recording system may be configured to include the line head 20 and the saddle-stitch folding mechanism 70 in one housing.
As described above, in this specification, the term "recording system" means either a collection of independent units or a single unit.

It should be noted that the present invention is not limited to the above-described embodiments, and that various modifications are possible within the scope of the invention described in the claims, which are also included in the scope of the present invention. Needless to say.

DESCRIPTION OF SYMBOLS 1... Recording system, 2... Recording unit, 3... Intermediate unit, 5... First unit, 6... Second unit, 10... Printer part, 11... Scanner part, 12... Medium accommodation cassette, 13... Ejection tray after recording, DESCRIPTION OF SYMBOLS 14... Cassette accommodation part 19... Operation part 20... Line head 21... Feeding path 22... First ejection path 23... Second ejection path 24... Reversing path 25... Control part 30... Receiving Path 31 First switchback path 32 Second switchback path 33 Merging path 35 Branching portion 36 Merging portion 40 First tray 40a Base portion 40b Extension portion 41 Receiving section 42 End binding section 43 First conveying path 44 Second conveying path 45 Third conveying path 46 Punch processing unit 47 Overlap processing unit 48 Processing tray 49 Upper tray 50 Drying section 51 Heat roller pair 52 Loop-shaped conveying path 59 Fourth conveying path 60 Fifth conveying path 61 First discharge section 62 Second discharge section 63 Third discharge section 64 Stacking path 65 Second tray 66 Regulation section 67 Guide section 68 Conveying roller pair 69 Conveying path 70 Saddle-stitching mechanism 70a Processing section 71... Stack part 72... Binding mechanism 72a... Binding part 73... Folding roller pair 74... Blade 75... Feed roller pair 76... Alignment part 76a... Pressing part 77... Contact part 78... Entering Path 79 Hole 80 Medium transport device 81 First paddle 81a Rotating shaft 81b Blade 82 Second paddle 82a Rotating shaft 82b Blade 83 First auxiliary paddle 83a...Rotating shaft, 83b...Blade, 84...Second auxiliary paddle, 84a...Rotating shaft, 84b...Blade, 85...Support surface, 86...Opposite surface, 91...First motor, 92...Second motor, 94...Power Transmitting portion 95 First side guide 95a Guide surface 96 Second side guide 96a Guide surface
P... medium, M... medium bundle, C... central part, D1... first branching part, D2... second branching part, D3... third branching part, G1... first merging part, G2... second merging part

Claims (9)

a feeding means for transporting a medium;
a stacking unit having a supporting surface for supporting the medium conveyed by the feeding means in an inclined posture in which the downstream side in the conveying direction faces downward, and for stacking the medium on the supporting surface ;
a first state in which a predetermined range upstream in the conveying direction from the downstream end of the medium stacked on the stacking section is pressed toward the support surface; a second state in which the medium is further away from the support surface than in the first state; and a presser that can switch between
the presser portion takes the first state in a state of waiting for the medium to be fed to the stacking portion;
When the medium is sent to the stacking unit, the first state is switched to the second state, and the medium is
returning from the second state to the first state after the body has been sent ;
When a plurality of media are stacked on the stacking unit, when the last medium is stacked on the stacking unit, the pressing force is higher than when the media before the last medium are stacked on the stacking unit. the timing at which the part returns from the second state to the first state is late;
A medium transport device characterized by: 2. The medium transporting device according to claim 1, wherein the pressing portion in the first state is arranged to extend from the support surface.
is distant from
A medium transport device characterized by: 3. The medium transport device according to claim 1, wherein the first side guide faces one edge in the width direction, which is the direction intersecting the transport direction, of the medium stacked on the stacking section, and the other side guide. a second side guide facing the edge;
The first side guide and the second side guide are displaceable between an alignment position for aligning the edge of the medium in the width direction and a spaced position away from the edge of the medium from the alignment position,
The first side guide and the second side guide are at the aligned position when waiting for the medium to be fed to the stacking section, and are displaced from the aligned position to the separated position when the medium is fed to the stacking section. and then returning from the spaced position to the aligned position;
When a plurality of sheets of media are stacked on the stacking unit, when the last medium is stacked on the stacking unit, the number of mediums before the last medium is more likely to be stacked on the stacking unit than when the media before the last medium are stacked on the stacking unit. The timing at which the first side guide and the second side guide return from the spaced position to the alignment position is late;
A medium transport device characterized by: 4. The medium conveying device according to claim 3 , wherein said holding portion returns from said second state to said first state after said first side guide and said second side guide return from said separated position to said alignment position. ,
A medium transport device characterized by: In the medium transport device according to claim 3 or 4 ,
an aligning unit that aligns downstream ends in the transport direction of media stacked on the stacking unit;
A moving member positioned between the feeding means and the aligning section in the conveying direction and opposed to the supporting surface, and rotating while in contact with the medium to move the medium toward the aligning section. comprising
A medium transport device characterized by: 6. The medium transport device according to any one of claims 3 to 5 , wherein the timing at which the pressing portion returns from the second state to the first state, and the timing at which the first side guide and the second side guide are The timing of returning from the spaced position to the alignment position is adjusted according to conditions when the medium is fed to the stacking unit.
A medium transport device characterized by: A medium transport device according to any one of claims 1 to 6 ;
a processing unit that processes the media stacked on the stacking unit;
processing equipment with a recording unit for recording on a medium;
8. The processing apparatus according to claim 7 , which receives and processes the medium on which recording has been performed by the recording unit;
system of record with a feeding means for transporting a medium;
The medium conveyed by the feeding means is supported in an inclined posture in which the downstream side of the conveying direction faces downward.
a stacking unit having a support surface for loading media on the support surface;
A predetermined range upstream in the conveying direction from the downstream end of the medium stacked on the stacking unit is supported.
a first state of pressing toward the supporting surface; and a second state of moving further away from the supporting surface than the first state.
A control method for a medium conveying device comprising a pressing section capable of switching between
Putting the pressing portion in the first state while waiting for the medium to be fed to the stacking portion.
and,
When the medium is sent to the stacking section, the pressing section is changed from the first state to the second state.
and
returning the pressing portion from the second state to the first state after the medium is fed;
When a plurality of media are stacked on the stacking unit and the last media is stacked on the stacking unit
When the media before the last medium are stacked on the stacking unit, the pressing unit is
delaying the timing of returning from the second state to the first state;
A control method for a medium transport device, characterized by:

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